Abstract: To improve the optical axis stabilization, the static unbalance torque of airborne photoelectric platform must be minimized with the help of balancing weight in assembling stage.An effective layout optimization method of multiple sensors in the airborne photoelectric platform in two-axis four-gimbal form was proposed to reduce the static unbalance torque in the design stage.The finite circle method was employed to establish the module overlap constraint and the optimization algorithm of globally convergent method of moving asymptotes was used to solve the layout optimization problem fast.Results show that this method succeeds in reducing the static unbalanced torques of the inner azimuth and pitch axes by 45% and 68%, respectively, which effectively reduces the balancing weight and improves the performance of EO platform.